Number | Date | Country | Kind |
---|---|---|---|
63-314110 | Dec 1988 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4613730 | Fechalos et al. | Sep 1986 | |
4763356 | Day, Jr. et al. | Aug 1988 | |
4788720 | Brennan et al. | Nov 1988 |
Entry |
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"Intelligent Telephone Sets", H. Strobel, TELECOMMUNICATIONS, Dec. 1980, pp. 59-61. |
"An Interactive Touch Phone for Office Automation", R. Hsing et al., IEEE Communications Magazine, vol. 23, No. 2, Feb. 1985, pp. 21-26. |